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Researchers at Shanghai Jiao Tong University have demonstrated a heterogeneous continuous-variable quantum key distribution (CVQKD) network that successfully integrates fiber optic and free-space links. This experiment validates the feasibility of using basis-encoding protocols in complex, multi-user environments, addressing critical performance gaps for real-world quantum communication deployments. The results suggest a viable pathway for transitioning existing infrastructure to more robust hybrid-channel quantum networks.

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Continuous-variable QKD shown with a heterogeneous access network

Quantum ZeitgeistSeptember 10, 20263 min read

Researchers demonstrated heterogeneous continuous-variable quantum key distribution, published September 9, 2026, via a hybrid network.

Researchers at Shanghai Jiao Tong University demonstrated continuous-variable quantum key distribution (QKD) across a network combining different communication channels. The experiment utilized a setup with both fiber optic cables and free-space links, extending QKD beyond isolated laboratory conditions. This work, published on September 9, 2026, in Quantum Science and Technology, tested a basis-encoding QKD protocol alongside traditional methods to improve performance in complex…

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